Digestion apparatus



Patented May 11, 1926.

UN 1 T E 9 STATE 1 isaaosa earner PHILIP A. GOLDLFISCH, OF KANSASCITY, MISSOURI.

DIGESTION AEPARATUS.

This invention relates to digestion apparatus used in carrying out the Kjeldahl process, and has for its primary object the provision ofan improved fume tube having refinements of construction which permits of the use of a smaller and less expensive ventilation fan.

A further object of the present. invention is to provide elfective drainage means throughout all the various parts of the fume tube.

An even further object of this invention is the provision of a new and novel flask engaging means which is formed integrally 'with the fume tube.

The invention is clearly illustrated in the accompanying drawing in which:

Figure 1. is a fragmentary side elevatlon of the. digestion apparatus constructed in accordance with this invention.

Fig. 2 is a vertical cross section of the apparatus taken ,on line IIII of Fig, 1.

Fig. 3 is an. enlarged, fragmentary, ver tical central section taken through one end of the fume tube and showing the operative position of the air supply nozzle.

Fig. 4 is an enlarged fragmentary cross section of the device taken on line IVIV of Fig. 1.

Fig. 5 is an enlarged detailed cross section taken through the fume tube and two of the oppositely disposed pockets formed therein and,

Figs. 6 and? are illustrations of a modified form of the present invention.

Similar reference characters refer to like parts throughout the several views, and the numeral 8 designates anysuitable table or support for the flask supporting members 9 and fume tube 10.

It is known in the art that flasks 11 are heated and the fumes passing therefrom are drawn oil through the use of a fume tube 10 and a ventilating means which, in this instance comprises a small blower fan 12 positioned to force air up and out a nozzle member 13. This nozzle member has its outlet end or smaller portion housed within the ventilating stack 14 which is formed integrally with fume tube 10. The nozzle intersects the axial line of the fume tube 10 and a space is left, as shown in Fig. 3, which is converted into a suction chamber when air is forced out through nozzle 13 by fan 12. The arrows indicate the flow of air, and clearly illustrate the manner in which the Application filed September 11, 1325.

lected water.

Serial No. 55,740.

fume tube 10 is ventilated. To eliminate the moisture created by condensation, fume tube 10 is constructed to form a chamber 15,

having a drain 16 which may be opened or closed in any suitable manner and from time to time to permit of the escape of col- Also, nozzle member 13 is formed to provide a similar chamber and drain 17 and 18 respectively which are utilized in the same manner and for the same purpose.

In apparatus ofthis character it is desired to provide a means for raising and lowering the fume tube with respect to the supports 9. In this instance, extensible brackets or legs 19' may be used to raise and lower fume tube 10, and any means such as the screwthreaded member 20 employed to maintain the nozzle 1 13 in its proper position.

lV'ith particular reference at this timeto the novel and desirable way of causing the flasks 11 to operatively engage fume tube 10, a series of pockets having annular walls 21 which progressively decrease in inner diameter as the bottom is reached are formed by the wall of fume tube 10. These pockets are adapted to have their axial line co-extensive with a radial line of the fume tube 10 and to receive the open end. of the flask 11 as it is positioned on the. support9. Forcing the mouth of the flask inwardly causes a snug fit to be established thereabout which precludes the escape of fumes. The bottom 22 of each pocket isformed to. provide a projection, positioned centrally thereof and adapted to enter the mouth of the flask, through which passes the vent opening 23 which forms a direct passage to the inside of fume tube 10. Thus, it is plain to be seen that a flask 11 will be securely held in position with a positive connection from its open end to the inside of the fume tubelO. This constructionv also brings the mouth of the fume tube very close to the suction action of the ventilating means and does not have a tendency to slow up the escaping action of the fumes by causing the same to pass through long passages. The pockets may be arranged along each side of the fume tube as shown in the drawing, or placed to best suit the desires of the user.

Each pocket wall 21 is provided with a drain opening 24 which acts to carry off any moisture forming on the inner side of the pocket walls and having a. tendency to flow from the same. 7

Referring to the modified form of the invention shown in Figs. 6 and 7, the same is substantially the same as that shown in Figs. 1 to 5 inclusive with the exception of the location of the pockets. In this instance it may be desired to have the same in the bottom of the fume tube 10. If so, a flask holder having a resilient holding means 50 may be used to maintain the mouth of flask 11 in engagement with the walls of the pocket. By using this form of construction,

the fume tube may be made circular. thus acconm'iodating a larger number of flasks in a smaller space than that required by the other forms.

hat is claimed is:

1. A fume tube for digestion apparatus of the class described having a series of inwardly projecting pockets formed in the wall thereof.

2. A fume tube for digestion apparatus of the class described comprising a cylinder having a series of inwardly projecting pockets formed integrally therewith.

3. A fume tube for digestion apparatus of the class described comprising a cylinder having a series of inwardly projecting pockets formed integrally therewith, the walls of said pockets being annular and having the axis thereof disposed on a radius line of said cylinder.

4:. In combination in digestion apparatus of the class described, a fume tube having a series of inwardly projecting pockets formed in the walls thereof, each pocket having means of communicating with the chamber of said fume tube, a flask supporting means adjacent said tube a series of flasks having their necks entering said pockets and means for ventilating said tube including a ventilating stack integral with said fume tube and extending perpendicularly therefrom, a nozzle member housed within said ventilating stack and intersecting the axial line of said fume tube and means for forcing air through said nozzle.

5. In digestion apparatus of the class described, a fume tube having a moisture collecting chamber and a drain integral therewith.

6. In digestion apparatus of the class described, a fume tube including a nozzle member terminating in a ventilating stack, said nozzle member having a moisture collecting chamber and a drain integral therewith.

7. In digestion apparatus of the class described, a fume tube having a series of pockets formed therein and a fume outlet formed in the bottom of each pocket, the inner periphery of the annular walls of each pocket progressively decreasing in diameter as the bottom of the pocket is approached.

8. In digestion apparatus of the class de scribed, a fume tube having a series of inwardly projecting pockets formed in the walls thereof and a fume outlet formed in the bottom of each pocket, said pockets having annular walls, the inner periphery of which progressively decreases in diameter as the bottom of the pocket is approached, the axis of the walls of each of said pockets being (Io-extensive with the radius of said. fume tube.

9. In digestion apparatus of the class de scribed, a fume tube having a series of inwardly projecting pockets formed in the wall thereof, the inner periphery of the annular walls of said pockets progressively decreasing in diameter as the bottom of the pocket is approached and a projection integral with the bottom of said pocket having an outlet passing therethrough.

10. In digestion apparatus of the class described, a fume tube having a series of inwardly projecting pockets formed in the wall thereof, the inner periphery of the annular walls of said pockets progressively decreasing in diameter. as the. bottom of the pocket is approached, a projection integral with the bottom of said pocket having an outlet passing therethnough and means for draining each of said pockets.

In testimony whereof I hereunto affix my signature this 24th day of August, 1925.

PHILIP A. GOLDFISGI-I. 

